Jig dyeing



C. NENTON JIG DYEING June 10, i969 mvENToR; CLIFFORD NEWTON *paul/IAM PMATTORNEYS June l0, 1969 c. NEWTON 3,448,470

JIG DYEING Filed May 29, 1957 sheet 2 of 2 INVENTOR:

CLIFFORD NEWTON BY PLM/m1, #Pm

ATTORNEYS 'United States Patent O 3,448,470 JIG DYEING Clifford Newton,Stockport, England, assignor to F. Smith & Co. (Whitworth) Limited,Whitworth, Rochdale, England Filed May 29, 1967, Ser. No. 642,088 Int.Cl. D06c 1/00; D06f 35/00 U.S. Cl. 8-151 12 'Claims ABSTRACT OF THEDISCLOSURE The invention concerns the dyeing of textile materials.

In the dyeing of textile materials it is import-ant that the temperatureof the material under processing be maintained at a predetermined levelthus to avoid dyeing faults, but difficulty is frequently experienced inthis regard. For example, if Va textile material under processing iswound onto a cold roller, the temperature of the material immediatelyAfalls thus to give rise subsequently to a dyeing fault in the fabric,it being -appreciated that the iixation of some conventional dyestuffs,for example, re- -active dyestutf is very sensitive to temperaturevariations. A similar effect obtains in the selvedge regions of -afabric where such regions are lfrequently of a lighter shade than thebody of the fabric due to cooling of the sides of the fabric whilst onthe roller.

It is the primary object of the present invention to provide a method ofand a means for avoiding or reducing the occurrence of theabovementioned diiiiculty.

Thus, according to the presen-t invention, in lthe dyeing of textilematerials in -a dye jig we -apply heat to those regions of the materialwound on a support roller which are subject to heat losses so as tomaintain the temperature of the material sensibly constant lthroughoutboth its wid-th and length.

The invention also includes apparatus for practicing the methodaforesaid vand having a heater means whereby the part of the fabric on aroller subject to heat loss is heated thereby to maintain thetemperature thereof at -a substantially constant level. Usually theheater means will be such as to raise the temperature of the roll uponwhich the -fabric is wound and also Ito provide a source of heat inclosely adjacent disposition relative to the cloth selvedge.

The heater means, as applied to the roller itself, feeds heating fluidto the interior of the roller, whilst the selvedge region of the woundfabric which is normally subjected to heat losses is maintained at arequired temperature by heated plates disposed adjacent the saidregions, or by spraying the heated dye liquor onto the selvedges.

The invention will now be described further, by way of example only withreference -to the accompanying drawings illustrating three embodimentsthereof and in which:

FIG. l shows, diagrammatically, a -roller arrangement constructed inaccordance with the invention;

FIG. 2 is a vertical section taken through a closed dye jig constructedaccording to the invention;

FIG. 3 is a section on line III- III of FIG. 2;

FIG. 4 is a side elevation of an alternative structure; and

FIG. 5 is a section on line V-V of FIG. 4.

Referring now to the drawings and in particular to FIG. 1 thereof, therollers 11 of a dye jig are each arranged to receive a heating mediumthereby to maintain the roller surface at or about a predeterminedtemperature level. The heating medium, in the form of a fluid, is takenfrom and returned to a heating circuit v12, the said circuit includingavheat-exchange 12a and a pump 12b whereby the medium is circulated.

Each roller ,11 has a hollow spindle 11a at one end thereof, the bore11a of the said spindle defining a passageway through which the heatingmedium return conduit 12C passes, the heating medium inlet 12d beingconstituted by the annular space between the return conduit 12e and thebore 11a'.

In operation, a heating medium is continuously -applied to the interiorof the rollers 11 through the respective hollow spindle 11a and is takentherefrom by the return conduits 12e, the latter having an end portionextending radially outwardly of the roller and terminating closelyadjacent the inner wall thereof.

In an alternative arrangement, see now FIGS. 2 and 3, -a closed dye jig20 is provided with a means 21 whereby the selvedges of the material onthe rollers is continuously sprayed with dye liquor taken from the jigand, therefore, at the same temperature thereas. The `means for applyingdye liquor comprises a closed circuit system formed by the jig bath 21a,feed conduits 2lb extending one on either side of the jig 20 Iandpassing from the bottom of the jig to a position above the rollers 22,the said conduits 2lb each terminating in a horizontally disposed spraymember 21C having perfor-ations 21d in that side thereof facing theroller.

In use, dye liquor is caused to flow from the dye bath 21a through thefed conduits 2lb to be sprayed onto the selvedge 23a of the material 23wound on the roller 22. From the material, excess liquor falls into thedye bath to be recirculated in due course. A heating medium will becaused to pass through the rollers, and the arrangement of FIG. l couldbe utilized for this purpose.

As an alternative to applying heat to the selvedge region by sprayingdye liquor taken from the dye bath onto such regions, a hollow cheekpiece 40 may be provided at each side of the jig in the manner shown inFIGS. 4 and 5, the pieces being positioned at the level of the rollers41 and having openings 40a therein to receive the ends of the saidrollers 41 so as to allow the adjustment of each cheek piece axially ofthe roller to a position closely adjacent the respective selvedge 42a ofa fabric 42, irrespective of the width of the fabric under processing.Inlet and outlet openings 40b, 40a` respectively are provided in theunderside of each cheek piece 40, and a heating medium is applied to thesaid pieces in any convenient manner, for example by a pump 24.

It will readily be appreciated that, by utilising the arrangements asabove described, it will be possible to maintain at a requisite levelthe temperature of the fabric on a roller, the optimum advantage beingobtained when both the body of the fabric (from the roller) and theselvedges (from the cheeks or sprays) are heated.

The invention is not restricted to the particular features of theembodiment hereinbefore described since alternatives will readilypresent themselves to one skilled in the art. Thus, for example, thenature of the heating medium may be selected to suit particularrequirements. Although in the embodiment shown in FIGS. 4 and 5 a singlecheek piece is provided at each side of the rollers and extends so as tocover the selvedge of fabric wound on each of the two spaced rollers,individual cheek pieces could be provided for each roller and, subjectto the provision of a suitable rotating seal, each individual cheekpiece could rotate with its respective roller.

What we claim is:

i1. A method of dyeing textile materials in a dye jig which includes thestep of applying heat to the selvedge regions of a material wound on asupport roller, which regions are normally subjected to heat losses, soas to maintain the temperature of the material sensibly constant in theregion of such potential heat loss.

2. 'Ihe method as claimed in claim 1 wherein said heat applying stepincludes the step of applying a heated uid to the selvedge regions ofthe wound material, the temperature of the -uid being substantiallyequal to that of the material.

3. The method as claimed in claim 2 wherein the heated dluid is takenfrom the dye bath.

4. The method as claimed in claim 2 wherein the uid is sprayed onto thesaid selvedge regions.

5. Textile dyeing apparatus including a heated roller upon which thematerial being dyed is wound, and a heater means disposed radiallyoutwardly of the roller and adapted to maintain substantially constantthe temperature in the selvedge regions of the material wound on suchroller.

6. Textile dyeing apparatus as claimed in claim 5 wherein the heatedroller is hollow, said roller is adapted to receive a heating uid andsaid apparatus includes a separate heat source for said heating lluid.

7. Textile dyeing apparatus as claimed in claim 5 wherein the saidheater means comprises one or more cheek pieces disposed adjacent thesaid selvedge regions.

8. Textile dyeing apparatus as claimed in claim 7 wherein the said cheekpieces are elongated and are adapted and arranged to apply heat tomaterial wound on spaced parallel rollers.

9. Textile dyeing apparatus as claimed in claim 7 wherein the said cheekpiecesfare'hollow and have inlet and outlet opening for the heatingmedium. l

10. Textile dyeing apparatus asclaimed fin' claim 5 wherein the saidheater means comprises a spraytube through which a heating medium isapplicable to the'selvedge regions. f $11. Textile `dyeing apparatus asvclaimed -in 'claim 5 wherein the heater means is adjustablelongitudinally of the rollers. v t t" 12. Textile dyeing apparatusvofthe type in which' a web 'of fabric's wound from one roll to anotherroll 'While a stretch is festooned in a dye bath, said apparatuscomprising: f l f f heater`means,rins ide of said rolls forheatingthvpfahric wound thereon from vinside the conyolu'tionsftheireofat a predetermined'v temperature, and l v l heater means, outside ofsaid Tolls, for heating "the sel 'vedge portions of the'fabric woundthereon, :"fro'm outside the yconvolutions thereof, to'`rIain'tai'rrthe20 I same at a constant predetermined temperatu 1je'.k 1

References vCited A UNITEDsTATEs PATENTS 25 263,540 8/1882 Landry v',l00-93 1,167,036 l/19l'6 Witham et al. xe l00+-93 i lFOREIGN PATENTS'l 377,770 7/17964 Switzerland.

30 WILLIAM I. P11-TOE, Primary Examffie'r.

1 Us. c1. xn'. 68-*180

